| http://www.w3.org/ns/prov#value | - An acoustic coupler used with an ultrasound probe and placed between a surface of an object to be acoustically inspected and the ultrasound probe, said acoustic coupler comprising:a body made of an acoustically transparent gelled material having a hardness and an elastically both capable of being partially varied, said body including an upper surface, provided on a part of the acoustically transpa
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